US 12,136,695 B2
Cylindrical secondary battery and manufacturing method thereof
Sung Pil Yoon, Daejeon (KR); Dong Myung Kim, Daejeon (KR); and Joo Hwan Sung, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/312,686
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Jan. 30, 2020, PCT No. PCT/KR2020/001433
§ 371(c)(1), (2) Date Jun. 10, 2021,
PCT Pub. No. WO2020/159256, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 10-2019-0012233 (KR), filed on Jan. 30, 2019.
Prior Publication US 2022/0069334 A1, Mar. 3, 2022
Int. Cl. H01M 10/04 (2006.01); H01M 50/107 (2021.01); H01M 50/179 (2021.01); H01M 50/533 (2021.01); H01M 50/538 (2021.01)
CPC H01M 10/0422 (2013.01) [H01M 10/0431 (2013.01); H01M 50/107 (2021.01); H01M 50/179 (2021.01); H01M 50/533 (2021.01); H01M 50/538 (2021.01)] 8 Claims
OG exemplary drawing
 
1. A cylindrical secondary battery in which an electrode assembly having a positive electrode/separator/negative electrode structure is positioned in a cylindrical battery can, the cylindrical secondary battery comprising:
a first insulating layer positioned at an upper end of the electrode assembly and having a first through hole through which an electrode tab extends; and
a second insulating layer mounted at an upper end of the first insulating layer and having a second through hole positioned to align with a central axis of the electrode assembly,
wherein the electrode assembly has a length dimension extending from a first end of the electrode assembly to a second end of the electrode assembly, the electrode assembly being wound along the length dimension about a central axis extending perpendicular to the length dimension,
wherein the electrode tab is located along the length dimension at a center point between the first and second ends of the electrode assembly before winding, and
wherein the electrode tab extends through the first through hole and bends so as to extend through the second through hole, the second hole being located along the central axis.